Charles ii



(No Model.) O. H. D. SINOENNES'.

STEP LADDER.

No. 469,751. v Patented Mar. 1, 1892.

@51 Moan? UNITED STATES PATENT OFFICE.

CHARLES H. D. SINCENNES, or MONTREAL, CANADA.

STEP-LADDER.

SPECIFICATION forming part of Letters Patent No. 469,751, dated March 1, 1892.

Application filed November 27, 1891. Serial No. 413,334. (No model.) Patented in Canada November 6, 1891, No. 37,741.

To all whom it may concern:

Be it known that 1, CHARLES HERCULE DAMASE SINCENNES, of the city of Montreal, in the district of Montreal and Province of Quebec, Canada, have invented certain new and useful Improvements in Safety Rolling Step-Ladders, (for which I have secured Letters Patent in Canada November 6, 1891, No. 37,741,) and I do hereby declare that the following is a full, clear, and exact description of said invention.

The invention consists in an improved construction of rolling step-ladders, whereby they are rendered safer, more durable, and less expensive in their manufacture. I combine with the shelving an upper and lower guiderailing presenting unobstructed traveling surfaces along their bottom and top edges, respectively, and carry upper and lower grooved rollers on the ladder, so that they shall travel along the under side and upper side, respectively, of said guide-railings. For full comprehension, however, of the invention, reference must be had to the accompanying drawings, forming a part of this specification, in which like symbols indicate corresponding parts, and where Figure 1 is a perspective view of my stepladder in position, and Fig. 2 a side elevation of the same.

A is the top board of the shelving; B, the usual counter-ledge of the same, and A B rods or rails secured along the underside and top, respectively, of such board and ledge.

O is the step-ladder, of any ordinary construction and carrying in metal shoes D D, on the upper ends of its side bars, grooved rollers D D, which travel along under the rail A. A proper support E, preferably formed of two arms e e, suitably braced and carrying grooved rollers E E at one end to travel on the rail B and having their opposite ends rigidly secured to the ladder about midway of its length, is used to support it above ground and at the angle most convenient for use.

It will be apparent that this ladder, being confined between the upper and lower guiderails, on the latter of which it is supported, will always run smoothly, as its whole weight from the shelving are in use, and I therefore lay no claim to such construction.

hat I claim is as follows:

1. The combination, with storeshelving and upper and lower guide-rails running longitudinally along the face of the same respectively at the top and midway to the bottom, the upper rail having a vertical downward projection, of a step-ladder provided with upper and lower rollers having traveling connection with and being spaced to the exact gage of. said guide-rails, the upper rollers being vertical and grooved to receive said downwardly-projecting rail, substantially as described.

2. The combination, with store-shelving and rails running longitudinally along the face of the same at the top and midway to the bottom and presenting unobstructed traveling surfaces along their bottom and top sides, respectively, the upper rail having averticai downward projection, of a step ladder provided with upper and lower vertical rollers having traveling connection with and being spaced to the exact gage of said guide-rails, substantially as described.

3. The combination, with store shelving and rails running longitudinally along the projecting top board and the counter-ledge of the same and presenting unobstructed traveling surfaces along their bottom and top edges, respectively, the upper rail having a vertical downward projection, of a step-ladder carrying vertical grooved rollers at its upper end adapted to receive such downward projection of the top' board rail, and a support carried by the ladder and projecting rearwardly to the counter-ledge rail, with the top traveling surface of which it has a traveling connection, as set forth.

4. The combination, with store shelving provided with upper and lower guide-railing carried by such shelving and presenting unobstructed traveling surfaces along their bot- I00 tom and top edges, respectively, the upper rail having avertical downward projection, of a step-ladder carrying vertical rollers having traveling connection with the said bottom and top edges of such railing.

5. The combination, with store-shelving, of an upper and lower horizontal railing carried on the face of such shelving, respectively near the top of the same and about midway to the bottom, the upper rail having avertical downward projection, and a step-ladder carrying on each of its side bars two vertical grooved rollers, one of which is located near the top and adapted to receive such downward projection of said upper railing and the other located about midway to the bottom CHARLES H. D. SINCENNES. Witnesses:

WlLL. P. MOFEAT, FRED. J. SEARS. 

